Difference Between AA and Pahoehoe

Basaltic lava generally takes two distinct forms known by the Hawaiian terms pahoehoe and aa. Pahoehoe has a smooth wavy surface that resembles twisted rope. ... As it travels pahoehoe lava often changes to blocky flows called aa. The surface of aa lava is brittle and rough, covered in broken lava blocks called clinkers.

1. Which of the following describes the difference between aa lava and pahoehoe lava?
2. Is aa lava hotter than pahoehoe?
3. What is a pahoehoe?
4. What does aa lava mean?
5. Can you walk on pahoehoe lava?
6. What volcano has the most violent eruptions?
7. Can lava kill you?
8. Is pahoehoe fast or slow?
9. What are the 3 types of magma?
10. How does pahoehoe flow?
11. What is the temperature of pahoehoe?
12. What type of rock is pahoehoe?

Which of the following describes the difference between aa lava and pahoehoe lava?

Terms in this set (10)

What is the difference between Pahoehoe and Aa lava? Pahoehoe lava is smoother and flows faster than Aa lava. Aa is much slower and hardens into a jagged surface while pahoehoe lava hardens into a smooth surface.

Is aa lava hotter than pahoehoe?

The most common way to divide lava flows into distinct types is following: Pahoehoe lava flow, Aa lava flow, Blocky lava flow, and also Pillow lava flow. ... The temperature of glowing lava is at least 475 °C. Bright yellow is hotter (over 1000 °C) and orange cooler (800… 900 °C).

What is a pahoehoe?

geology. : basaltic lava having a smooth, often billowy, shiny surface Thick, folded lava such as this is known by its Hawaiian nickname of pahoehoe. A highly fluid lava, pahoehoe spreads in thin sheets and is sculpted into ropy folds as flow continues below the hardening surface.—

What does aa lava mean?

In volcano: Lava flows. … smooth to ropy surface; and aa (or a'a), a more viscous flow whose surface is covered by thick, jumbled piles of loose, sharp blocks. Both types have the same chemical composition; the difference seems to be in the eruptive temperature and the speed of movement of the flow.

Can you walk on pahoehoe lava?

Walking is easy on the pahoehoe lavas. ... On the coastal platform, high fluidity lava traveled over a smooth, flat surface, where it ponded and formed a smooth solidified crust.

What volcano has the most violent eruptions?

Because they form in a system of underground conduits, stratovolcanoes may blow out the sides of the cone as well as the summit crater. Stratovolcanoes are considered the most violent.

Can lava kill you?

Lava won't kill you if it briefly touches you. You would get a nasty burn, but unless you fell in and couldn't get out, you wouldn't die. ... Blong (1984) points out that little research has been done on injuries caused by lava. People have been killed by very fast moving lava flows.

Is pahoehoe fast or slow?

If lava cools slowly and does not move too fast it forms smooth ropy lava called pahoehoe. However, if it cools quickly and moves fast it can tear into clinkery pieces called a'a. Temperature and gases certainly influence whether the lava becomes aa or pahoehoe.

What are the 3 types of magma?

There are three basic types of magma: basaltic, andesitic, and rhyolitic, each of which has a different mineral composition. All types of magma have a significant percentage of silicon dioxide. Basaltic magma is high in iron, magnesium, and calcium but low in potassium and sodium.

How does pahoehoe flow?

Pahoehoe lava flows are characterized by smooth, gently undulating, or broadly hummocky surfaces. The liquid lava flowing beneath a thin, still-plastic crust drags and wrinkles it into tapestry-like folds and rolls resembling twisted rope.

What is the temperature of pahoehoe?

Pahoehoe lavas typically have a temperature of 1,100 to 1,200 °C (2,010 to 2,190 °F).

What type of rock is pahoehoe?

Extrusive igneous rocks form on the earth's surface. Lava flows form from volcanic eruptions. Lava flows are a type of extrusive igneous rock. This lava, from Hawaii, is called pahoehoe because of its smooth, shiny, ropy texture.